GB2157367A - Device for influencing the fuel delivery of an injection pump - Google Patents

Device for influencing the fuel delivery of an injection pump Download PDF

Info

Publication number
GB2157367A
GB2157367A GB08509060A GB8509060A GB2157367A GB 2157367 A GB2157367 A GB 2157367A GB 08509060 A GB08509060 A GB 08509060A GB 8509060 A GB8509060 A GB 8509060A GB 2157367 A GB2157367 A GB 2157367A
Authority
GB
United Kingdom
Prior art keywords
actuator
sleeve
fuel
lever
drive shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08509060A
Other versions
GB8509060D0 (en
GB2157367B (en
Inventor
Willi Wortmann
Heinz Roloff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Publication of GB8509060D0 publication Critical patent/GB8509060D0/en
Publication of GB2157367A publication Critical patent/GB2157367A/en
Application granted granted Critical
Publication of GB2157367B publication Critical patent/GB2157367B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/04—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by mechanical control linkages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D11/107—Safety-related aspects

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

Depending on the deflection of an accelerator pedal, a delivery control lever 2 of the injection pump 1 is deflected by an actuator 5. To achieve an emergency driving operation in the event of failure of the actuator 5, the first actuator 5 is overridden by a second actuator 14 which deflects the lever 2 into a position in which the internal combustion engine is operative within a lower load range. A hand- operated valve 18 when actuated admits compressed air into the actuator 14 which moves a sleeve 10 into engagement with a sleeve 7 linked to the lever 2. <IMAGE>

Description

SPECIFICATION Device for influencing the-fuel delivery of an injection pump The invention relates to a device for influencing the fuel delivery of an injection pump of a fuel injection system for an internal combustion engine.
The ATZ, Volume 85, pages 539 to 548, discloses a seif-igniting internal combustion engine with an electronic fuel pump controller which, depending on the accelerator pedal position of an electric accelerator and on other operating characteristics of the internal combustion engine, determines the quantity of fuel to be delivered to the internal combustion engine. An actuating drive which influences the fuel injection pump is triggered by a signal on the output side from the controller, which signal describes the quantity of fuel.
However, it is a disadvantage in this case that not ali the conceivable breakdowns or malfunctions can be compensated for by an already existing emergency driving program.
The present invention seeks, in the event of failure of the actuator of the fuel injection pump, to set the quantity of fuel delivered to a value which makes an emergency driving operation possible.
According to the present invention there is provided a device for influencing the fuel delivery of an injection pump of a fuel injection system for an internal combustion engine, the quantity of fuel to be delivered to this engine being determined by an accelerator pedal which influences a first actuator which acts on an injection pump floating lever to vary the quantity of fuel delivered, including a second actuator adapted to override the first actuator in the event of failure of the first actuator so to position the floating lever that the internal combustion engine, in use, is operative with a lower load range.
Preferably, the second actuator is a pneumatically operated single acting cylinder. In a preferred embodiment, a regulating lever is fixed on a sleeve which is arranged coaxially with and fast on a drive shaft of the first actuator and which has, in the longitudinal axis of the drive shaft, a vertical plane in which are arranged obliquely axially extending faces which cooperate with corresponding oblique faces provided in a slidable sleeve arranged slidably coaxially on the drive shaft, the sliding sleeve being operatively connected to the pneumatically operable cylinder by a transmission lever whereby operation of said cylinder moves the sleeve axially so that the oblique faces thereon engage with the faces on the sleeve fixed to said drive shaft.
The device according to the invention has the advantage that, even in the event of possible electric power failure, the internal combustion engine continues to remain operative and, consequently, a motor vehicle can be removed from places where traffic is endangered or which causes an obstruction to traffic (for example, level crossings or intersections) by its own driving power.
An embodiment of the invention will now be described by way of example with reference to the accompanying drawing.
A self-igniting internal combustion engine (not shown in detail) has an associated fuel injection pump 1, a floating lever 2 of which is connected to a regulating lever 4 of an actuator 5 by a connecting rod 3. The electromagnetic actuator 5 comprises a drive shaft 6 on which a sleeve 7 is coaxially and nonrotatabiy mounted, the regulating lever 4 being fixed on this sleeve. On one side which is remote from the actuator 5, the sleeve 7 has an axially disposed face 8 with raised obliquely extending (V-shaped) areas 9 which cooperate with corresponding axially disposed obliquely extending areas on a face 11 of a sliding sleeve 10 arranged slidably but nonrotatably coaxially on the drive shaft 6.The sliding sleeve 10 is attached to one end of a transmission lever 12, and a piston rod 1 3 of a pneumatically operated cylinder 14 is attached to the other end of this lever. The cylinder 14 is fixed on a bracket 1 5 which supports the actuator 5. The working chamber of the cylinder 14 is connected to a compressed air reservoir 1 7 by a compressed-air line 1 6. A hand-operated 3/2-way valve 1 8 is arranged in this compressed air line 16.
In the event of a failure in the electric power supply or of a breakdown of a control unit (not shown in detail), the 3/2-way valve 1 8 is actuated and, following this operation, the working chamber of the cylinder 14 is subjected to the impact of compressed air from the compressed air reservoir 1 7 and moves inward. The sliding sleeve 10 is then moved along the drive shaft 6 towards the sleeve 7.The slopes of the obliquely extending areas of the face 11 of the sliding sleeve 10 are so angularly disposed relative to the corresponding oblique faces of the V-shaped cam 9 formed on the end of the sleeve 7 that, in the event of electrical failure, the sleeve 7 is moved into a preset position in which the regulating lever 4 is pivotted, whereby the floating lever 2 also is operated via the connecting rod 3 to set the quantity of fuel delivered by the pump 1 to a predetermined value.
It was determined in driving tests the extent to which the floating lever 2 must be pivotted by the cylinder 1 4 to ensure that a motor vehicle loaded to capacity can still be driven on an uphill gradient of 10% to 15%.
1. A device for influencing the fuel delivery of an injection pump of a fuel injection system for an internal combustion engine, the
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Device for influencing the-fuel delivery of an injection pump The invention relates to a device for influencing the fuel delivery of an injection pump of a fuel injection system for an internal combustion engine. The ATZ, Volume 85, pages 539 to 548, discloses a seif-igniting internal combustion engine with an electronic fuel pump controller which, depending on the accelerator pedal position of an electric accelerator and on other operating characteristics of the internal combustion engine, determines the quantity of fuel to be delivered to the internal combustion engine. An actuating drive which influences the fuel injection pump is triggered by a signal on the output side from the controller, which signal describes the quantity of fuel. However, it is a disadvantage in this case that not ali the conceivable breakdowns or malfunctions can be compensated for by an already existing emergency driving program. The present invention seeks, in the event of failure of the actuator of the fuel injection pump, to set the quantity of fuel delivered to a value which makes an emergency driving operation possible. According to the present invention there is provided a device for influencing the fuel delivery of an injection pump of a fuel injection system for an internal combustion engine, the quantity of fuel to be delivered to this engine being determined by an accelerator pedal which influences a first actuator which acts on an injection pump floating lever to vary the quantity of fuel delivered, including a second actuator adapted to override the first actuator in the event of failure of the first actuator so to position the floating lever that the internal combustion engine, in use, is operative with a lower load range. Preferably, the second actuator is a pneumatically operated single acting cylinder. In a preferred embodiment, a regulating lever is fixed on a sleeve which is arranged coaxially with and fast on a drive shaft of the first actuator and which has, in the longitudinal axis of the drive shaft, a vertical plane in which are arranged obliquely axially extending faces which cooperate with corresponding oblique faces provided in a slidable sleeve arranged slidably coaxially on the drive shaft, the sliding sleeve being operatively connected to the pneumatically operable cylinder by a transmission lever whereby operation of said cylinder moves the sleeve axially so that the oblique faces thereon engage with the faces on the sleeve fixed to said drive shaft. The device according to the invention has the advantage that, even in the event of possible electric power failure, the internal combustion engine continues to remain operative and, consequently, a motor vehicle can be removed from places where traffic is endangered or which causes an obstruction to traffic (for example, level crossings or intersections) by its own driving power. An embodiment of the invention will now be described by way of example with reference to the accompanying drawing. A self-igniting internal combustion engine (not shown in detail) has an associated fuel injection pump 1, a floating lever 2 of which is connected to a regulating lever 4 of an actuator 5 by a connecting rod 3. The electromagnetic actuator 5 comprises a drive shaft 6 on which a sleeve 7 is coaxially and nonrotatabiy mounted, the regulating lever 4 being fixed on this sleeve. On one side which is remote from the actuator 5, the sleeve 7 has an axially disposed face 8 with raised obliquely extending (V-shaped) areas 9 which cooperate with corresponding axially disposed obliquely extending areas on a face 11 of a sliding sleeve 10 arranged slidably but nonrotatably coaxially on the drive shaft 6.The sliding sleeve 10 is attached to one end of a transmission lever 12, and a piston rod 1 3 of a pneumatically operated cylinder 14 is attached to the other end of this lever. The cylinder 14 is fixed on a bracket 1 5 which supports the actuator 5. The working chamber of the cylinder 14 is connected to a compressed air reservoir 1 7 by a compressed-air line 1 6. A hand-operated 3/2-way valve 1 8 is arranged in this compressed air line 16. In the event of a failure in the electric power supply or of a breakdown of a control unit (not shown in detail), the 3/2-way valve 1 8 is actuated and, following this operation, the working chamber of the cylinder 14 is subjected to the impact of compressed air from the compressed air reservoir 1 7 and moves inward. The sliding sleeve 10 is then moved along the drive shaft 6 towards the sleeve 7.The slopes of the obliquely extending areas of the face 11 of the sliding sleeve 10 are so angularly disposed relative to the corresponding oblique faces of the V-shaped cam 9 formed on the end of the sleeve 7 that, in the event of electrical failure, the sleeve 7 is moved into a preset position in which the regulating lever 4 is pivotted, whereby the floating lever 2 also is operated via the connecting rod 3 to set the quantity of fuel delivered by the pump 1 to a predetermined value. It was determined in driving tests the extent to which the floating lever 2 must be pivotted by the cylinder 1 4 to ensure that a motor vehicle loaded to capacity can still be driven on an uphill gradient of 10% to 15%. CLAIMS
1. A device for influencing the fuel delivery of an injection pump of a fuel injection system for an internal combustion engine, the quantity of fuel to be delivered to this engine being determined by an accelerator pedal which influences a first actuator which acts on an injection pump floating lever to vary the quantity of fuel delivered, including a second actuator adapted to override the first actutor in the event of failure of the first actuator so to position the floating lever that the internal combustion engine, in use, is operative within a lower load range.
2. A device according to claim 1, wherein the second actuator is a pneumatically operated single-acting cylinder.
3. A device according to claims 1 or 2, wherein a regulating lever is fixed on a sleeve which is arranged coaxially with and fast on a drive shaft of the first actuator and which has, in the longitudinal axis of the drive shaft, a vertical plane in which are arranged obliquely axially extending faces which cooperate with corresponding oblique faces provided in a slidable sleeve arranged slidably coaxially on the drive shaft, the sliding sleeve being operatively connected to the pneumatically operable cylinder by a transmission lever whereby operation of said cylinder moves the sleeve axially so that the oblique faces thereon engage with the faces on the sleeve fixed to said drive shaft.
4. A device for influencing the fuel delivery of an injection pump of a fuel injection system substantially as decribed herein with reference to and as illustrated in the accompanying drawing.
GB08509060A 1984-04-12 1985-04-09 Device for influencing the fuel delivery of an injection pump Expired GB2157367B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843413771 DE3413771C2 (en) 1984-04-12 1984-04-12 Device for influencing the fuel delivery rate of an injection pump

Publications (3)

Publication Number Publication Date
GB8509060D0 GB8509060D0 (en) 1985-05-15
GB2157367A true GB2157367A (en) 1985-10-23
GB2157367B GB2157367B (en) 1987-12-02

Family

ID=6233361

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08509060A Expired GB2157367B (en) 1984-04-12 1985-04-09 Device for influencing the fuel delivery of an injection pump

Country Status (4)

Country Link
DE (1) DE3413771C2 (en)
FR (1) FR2562951B1 (en)
GB (1) GB2157367B (en)
SE (1) SE455520B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269780A1 (en) * 1986-12-03 1988-06-08 VDO Adolf Schindling AG Transmission system for the position of a control element operable by the driver of a vehicle
EP0401155A1 (en) * 1989-05-30 1990-12-05 Jesa Automobile, Jutzeler, Erlenbach Device for the regulation of rotation speed, in particular for the limitation of the rotation speed of a combustion engine
WO1991013250A1 (en) * 1990-02-23 1991-09-05 Robert Bosch Gmbh Device for operating a load-adjustment element in a fuel-supply device for internal-combustion engines

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791366A (en) * 1970-11-10 1974-02-12 Millan C Mac Fail-safe throttle control

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1247853A (en) * 1967-09-13 1971-09-29 Heinrich Gussenbauer Improvements in and relating to setting devices for the throttle valve operating mechanisms of engines
US3527118A (en) * 1968-07-10 1970-09-08 Us Navy Selective automatic and manual throttle actuator
JPS5751915A (en) * 1980-09-10 1982-03-27 Nissan Motor Co Ltd Fuel injection quantity controller
JPS59153945A (en) * 1983-02-21 1984-09-01 Nissan Motor Co Ltd Apparatus for controlling throttle valve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3791366A (en) * 1970-11-10 1974-02-12 Millan C Mac Fail-safe throttle control

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269780A1 (en) * 1986-12-03 1988-06-08 VDO Adolf Schindling AG Transmission system for the position of a control element operable by the driver of a vehicle
EP0401155A1 (en) * 1989-05-30 1990-12-05 Jesa Automobile, Jutzeler, Erlenbach Device for the regulation of rotation speed, in particular for the limitation of the rotation speed of a combustion engine
WO1991013250A1 (en) * 1990-02-23 1991-09-05 Robert Bosch Gmbh Device for operating a load-adjustment element in a fuel-supply device for internal-combustion engines
US5245967A (en) * 1990-02-23 1993-09-21 Robert Bosch Gmbh Device for actuating a load adjusting element of a fuel supply device for internal combustion engines

Also Published As

Publication number Publication date
FR2562951B1 (en) 1987-02-20
DE3413771C2 (en) 1986-10-16
SE455520B (en) 1988-07-18
FR2562951A1 (en) 1985-10-18
SE8501765D0 (en) 1985-04-10
SE8501765L (en) 1985-10-13
DE3413771A1 (en) 1985-10-24
GB8509060D0 (en) 1985-05-15
GB2157367B (en) 1987-12-02

Similar Documents

Publication Publication Date Title
US2690712A (en) Automatic throttle control
EP0385189A1 (en) Acceleration aid for an exhaust gas turbocharged engine
US4643146A (en) Apparatus for controlling the rotary speed of a diesel engine for a hydraulic excavator or the like
EP0020860A1 (en) Device for limiting the driving speed of a motor vehicle
US3963091A (en) Speed control devices
GB2157367A (en) Device for influencing the fuel delivery of an injection pump
DE4413999A1 (en) Actuator-drive for vehicle friction clutch
DE3225920C2 (en)
US5066201A (en) Driving load controller for variable displacement type hydraulic pump
US6006880A (en) Power take-off release mechanism
DE3800876A1 (en) Power output control device for an internal combustion engine
NL7808685A (en) DEVICE FOR LIMITING THE MAXIMUM SPEED OF A COMBUSTION ENGINE OF A MOTOR VEHICLE
US3756747A (en) Speed control for engine driven fluid compressor
EP0045847B1 (en) Automatic speed control systems
JPS61255227A (en) Fuel injection pump for internal combustion engine
US3099329A (en) Reciprocating hydraulic speed control device
GB2136503A (en) A controller for limiting the speed of an internal combustion engine of a motor vehicle
US4424782A (en) Shut-off device for a self-igniting internal combustion engine
US4164120A (en) Control device for combustion engine
DE19538334A1 (en) Minimum-pressure servo pump e.g. for vehicle diesel engine
DE3715959A1 (en) Device on a Motor Vehicle
DE4207319C2 (en) Actuator for speed-limiting control of a motor vehicle
EP0315751A2 (en) Device for limiting the maximum speed of revolution of an internal-combustion engine driving a vehicle
DE19718692C2 (en) Device for limiting the speed of internal combustion engines
JPS62110533A (en) Car-speed controller and electric type regulating mechanism for car-speed automatic regulator

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee